Monochromatic LED illumination with sodium filter which only transmits light with wavelength 589nm. Without green part due to narrow 15nm bandwidth.
SCHOTT/Carl ZEISS LaSF Glass
Large bearing surface (0.2 x 0,45") made of special colourless SCHOTT/ZEISS LaSF glass. Very resistant to scratches and chemicals.
Refractometer Contact Liquid nD 1.79
Highly transparent refractometer liquid with new formula, less toxic and no crystallization. The refractive index of nD 1.79 is suitable for all most important gem tests.
Battery Pack
The included battery power pack gives you independence from power sockets when travelling.
Docking Station
You need a docking station for your GemLED refractometer? Maybe our Module 1 with polariscope from the GEMMODUL® Series is of interest for you.